Greetings Jonathan,
I don't even know who John Todd is. I do not let "extremist Protestant fundamentalist sources" dictate my beliefs at all. I submit to the teachings of the Orthodox Catholic Church, and I strive to acquire the mind of the Fathers. Like a broken clock, even Protestant fundamentalists can be right a couple times a day. The fact of the matter is, there are so many different Protestant sects out there with so many varied beliefs, that is is not difficult to find many more Protestant websites promoting the writings of C.S. Lewis than you will find criticizing him.
C.S. Lewis is a writer not far removed from our times who wrote in English. It's not like there are a lot of saints and holy teachers who would have had exposure to his writings. C.S Lewis is popular in the Western English-speaking world because he has been promoted heavily by the Masons/Illuminati, who have successfully installed their agents at the highest levels of the apostate Christian world.
I would be curious to learn who Jonathan would consider acceptable as a "reputable Orthodox source"? I can find criticism of Harry Potter by "reputable" or well-known Orthodox sources (Fr. Ephrem's monastery in AZ is one that comes to mind), but on the other side, bishops and clergy of the Synod in Resistance readily promote the series.
To be honest, I am simply not aware of any formal reviews/critiques of the Narnia books by any Orthodox source, period. However, I am quite well-versed in what the holy scriptures and holy fathers of the Church have to say about pagan mythological deities (demons) such as Pan/Faunus, Dionysius/Bacchus, the Bacchanalian rites, and what they say about satyrs and incubi and such.
It would be helpful if Jonathan and Maria would share with us if they simply reject outright the notion of Mr. Tumnus being a Pan-like figure, or rather do they accept that Mr. Tumnus is styled or modeled after the pagan deity Pan, but do not find that to be a problem.
There would be little purpose for me to try to convince you that it is disturbing for Lewis to have chosen a Pan-like figure for this character in his story, if you will not accept the basic premise that Mr. Tumnus is Pan. I would first have to convince you that Mr. Tumnus is very much Pan-like, and it was the deliberate intent of the author to portray him this way. I am not going to go through the trouble of convincing you that Mr. Tumnus is indeed Pan, if you have already made up your mind that Pan is merely a benign or harmless figure, making it acceptable for young children to be exposed to Lewis's writings.
So please tell us what you think of the demon Pan, and we can move forward with a cogent argument.